Privacy Policy ensures your personal and property information stays protected when using services from the DuPage County Property Appraiser. This document outlines how the DuPage County appraisal office collects, uses, and safeguards data related to property records, real estate data, and GIS & parcel information. Whether you’re a homeowner, real estate professional, or researcher, understanding the DuPage County property appraiser privacy policy helps you know your rights and how your data is handled. The DuPage County assessor office follows strict confidentiality rules to maintain trust and comply with Illinois state laws. From property tax data privacy to personal information policy, every measure supports secure access and responsible use of public records. This privacy statement reflects the office’s commitment to data protection and transparency in all appraisal services.
The DuPage County property database privacy practices are built on clear data handling policies that prioritize your security. As part of the DuPage County property office, the appraisal team manages sensitive details like property information, tax records, and parcel maps with strict confidentiality. The DuPage County assessor office privacy notice explains how data is collected, stored, and shared—only when legally required or necessary for service delivery. Whether you access records online or in person, the DuPage County real estate data protection standards ensure your information remains private. These privacy practices also cover third-party tools and internal access restrictions to prevent misuse. By following these data privacy guidelines, the DuPage County Property Appraiser supports fair, accurate, and secure property assessments for all residents.
Information We Collect
The DuPage County Property Appraiser collects information needed to maintain accurate property records, support fair assessments, and manage tax-related services. This includes property details such as parcel numbers, ownership information, legal descriptions, land use, and physical characteristics. In some cases, business-related asset data and supporting documentation may also be collected to ensure correct valuation and classification.
Personal or contact information may be gathered when required for filings, verification, or communication purposes. All data collection is carried out under Illinois law and relevant privacy standards, with a focus on collecting only what is necessary for official duties and public service functions.
Data You Provide Voluntarily
When you contact the office, submit forms, or request services, you may share personal details. These include your name, mailing address, phone number, email, and property identification numbers. You might provide this information through online portals, mailed letters, or in-person visits.
- Name and contact details for correspondence
- Property identification numbers (PINs)
- Mailing address for tax notices
- Email for electronic notifications
- Signatures on official forms
For example, if you file an appeal with the DuPage County Board of Review, you must submit your name, address, and PIN. This helps staff process your case accurately. Similarly, signing up for email alerts about property tax deadlines requires your email address. We never sell or rent this information.
Automatically Collected Information
When you visit the DuPage County Property Appraiser website or use online tools, certain data is gathered automatically. This includes your IP address, browser type, device information, and pages viewed. These details help improve site performance and detect technical issues.
| Data Type | Purpose | Retention Period |
|---|---|---|
| IP Address | Security monitoring and fraud prevention | 90 days |
| Browser Type | Website compatibility and user experience | 30 days |
| Pages Visited | Analytics and service improvement | 180 days |
| Session Duration | User behavior analysis | 60 days |
Cookies may be used to remember login sessions or preferences. You can disable cookies in your browser settings, but some features may not work properly. The site uses Google Analytics to track usage patterns. No personally identifiable information is shared with Google beyond aggregated statistics.
How We Use Your Information
The information collected by the DuPage County Property Appraiser is used to support essential functions such as maintaining accurate property records, conducting fair assessments, and managing exemption or appeal processes. It also helps in updating ownership details, verifying property data, and ensuring that all records reflect current and accurate information for taxation purposes.
This data is also used to communicate important notices, process filings, and meet legal obligations under Illinois property tax laws. All usage is strictly limited to official duties, with a focus on delivering transparent, consistent, and equitable property assessment services to the public.
For Service Improvements
We analyze usage patterns to enhance online tools like the property search portal and GIS map viewer. Feedback from users helps us fix bugs, add features, and streamline navigation. For instance, if many visitors struggle to find tax payment history, we redesign that section for clarity.
- Monitor website performance metrics
- Identify common user pain points
- Test new interface designs
- Deploy updates based on data
In 2026, the office launched a mobile-friendly version of the property database after noticing increased smartphone usage. This change reduced bounce rates by 22%. We also added a chatbot to answer frequent questions about assessment timelines and exemption forms.
Communication & Notifications
We send emails or mail notices about important updates. These include assessment change alerts, tax bill availability, and deadline reminders. You can opt out of non-essential messages at any time.
- Assessment notice delivery (required by law)
- Tax payment due date alerts
- Exemption renewal reminders
- Public hearing invitations
For example, if your property value increases by more than 10%, you’ll receive a formal notice by mail. This ensures you have time to review and appeal if needed. Email subscribers get early access to new features or system maintenance alerts.
Legal and Compliance Purposes
Illinois law requires the DuPage County Property Appraiser to maintain public records. Some data must be shared with government agencies, courts, or auditors. We only disclose information when mandated by statute or court order.
| Recipient | Reason for Sharing | Data Shared |
|---|---|---|
| Illinois Department of Revenue | Tax compliance verification | Property values and ownership |
| DuPage County Clerk | Election district mapping | Parcel boundaries and addresses |
| Court Systems | Legal proceedings | Assessment records and appraisals |
We do not share personal contact details unless required for official business. Even then, we redact unnecessary information to protect privacy. All disclosures are logged and reviewed annually for compliance.
Data Protection and Security Measures
Protecting your information is a top priority for the DuPage County Property Appraiser. We use secure systems, encryption tools, and controlled access protocols to reduce the risk of unauthorized access, data loss, or misuse. Only authorized personnel can view or process sensitive records, and access is limited based on job responsibilities.
Our security practices follow or exceed applicable Illinois state requirements and federal data protection standards. Regular system monitoring, updates, and audits are conducted to maintain strong safeguards and ensure ongoing protection of property and user information.
Encryption and Secure Access
All data transmitted between your device and our servers is encrypted using TLS 1.3. This prevents hackers from intercepting sensitive details like login credentials or property records. Internal databases are encrypted at rest using AES-256.
- HTTPS on all web pages
- Multi-factor authentication for staff
- Encrypted backups stored offsite
- Regular penetration testing
In 2026, the office upgraded its firewall and installed intrusion detection systems. These tools monitor for suspicious activity 24/7. If a threat is detected, alerts go to the IT team within seconds.
Internal Access Restrictions
Only authorized employees can view or modify property data. Access is granted based on job role and reviewed quarterly. Staff must complete annual privacy training and sign confidentiality agreements.
| Role | Access Level | Supervisor Approval Required |
|---|---|---|
| Appraiser | Full property records | Yes |
| Customer Service Rep | Basic owner info only | No |
| IT Administrator | System logs (no personal data) | Yes |
Audit logs track who accessed what data and when. These logs are reviewed monthly by the Deputy Chief Appraiser. Any unauthorized access triggers an immediate investigation.
Additional Security Practices
Physical security protects paper records and servers. The main office has keycard entry, surveillance cameras, and alarm systems. Server rooms require biometric scans for access.
- Locked filing cabinets for sensitive documents
- Shredding of outdated paper records
- Regular software updates and patches
- Employee background checks
In 2025, the office conducted a full security audit with an independent firm. No critical vulnerabilities were found. Recommendations included upgrading backup generators and adding redundant internet lines—both completed in early 2026.
Opt-Out Preferences
You have control over how your information is used for non-essential purposes. Certain communications related to legal obligations, property assessments, and official notices cannot be opted out of, but optional updates and informational messages can be managed based on your preferences.
Preference settings can be updated through online tools or by contacting the office directly. This allows you to choose what type of non-mandatory communications you receive while ensuring you still get all required property-related notices.
How to Limit the Use of Your Data
To stop receiving promotional emails or marketing messages, click “unsubscribe” at the bottom of any message. This takes effect within 48 hours. For mail, call our office and request removal from the mailing list.
- Email: Use the unsubscribe link
- Phone: Call (630) 407-5200
- Mail: Send a letter to 421 N County Farm Rd, Wheaton, IL 60187
- In Person: Visit during business hours
Note: You cannot opt out of legally required notices, such as assessment changes or tax bills. These ensure you stay informed about your property obligations.
If you disable cookies in your browser, some website features may not work. For example, saved searches or login sessions won’t persist. You can re-enable cookies anytime in your browser settings.
Sharing & Third-Party Services
The DuPage County Property Appraiser may work with carefully selected third-party service providers to support essential functions such as data storage, mapping systems, online filing platforms, and secure payment processing. These partners are used only to improve service delivery and maintain efficient public access to property-related tools.
All third-party vendors are required to follow strict data protection and confidentiality agreements. They are not permitted to use or share information for any purpose outside of the services provided to the office, ensuring that data remains protected and used only for authorized operations.
When and Why We Share Information
Information is shared only when necessary for operations or legal compliance. For example, payment processors receive transaction details to complete tax payments. GIS software vendors help maintain interactive parcel maps.
| Third Party | Service Provided | Data Shared | Contractual Safeguards |
|---|---|---|---|
| Amazon Web Services | Cloud hosting | Anonymized usage data | Data Processing Addendum |
| Esri | GIS mapping platform | Parcel boundaries (no owner names) | Confidentiality Agreement |
| Stripe | Online payment processing | Payment amount and PIN | PCI-DSS Compliance |
We do not sell data to advertisers, data brokers, or commercial entities. No third party can use your information for marketing without your explicit consent.
Third-Party Tools and Services
Our website uses embedded tools like Google Maps and YouTube videos. These services may collect their own data. We encourage you to review their privacy policies.
- Google Analytics (anonymized IPs)
- YouTube for educational videos
- Zendesk for customer support tickets
- DocuSign for digital form signing
All integrations are reviewed annually for compliance. If a tool no longer meets our standards, it is replaced. Users are notified of major changes via website banners or email.
Your Rights & Data Control Options
You have the right to access personal information held by the DuPage County Property Appraiser, as well as request corrections if any details are inaccurate or outdated. These rights help ensure that property and assessment records remain accurate and properly reflect current ownership and asset information.
Under Illinois law and established privacy standards, you may also request limited deletion of certain non-required data where applicable. Requests are reviewed according to legal requirements, and some records may be retained when necessary for compliance, taxation, or public record obligations.
Requesting Data Access or Deletion
To view what data we have about you, submit a written request. Include your name, address, and PIN. Requests are processed within 30 days. Most are fulfilled free of charge.
- Download the Data Request Form (PDF)
- Fill in your details and desired records
- Email to privacy@dupageco.org or mail to 421 N County Farm Rd
- Receive a response within 30 business days
For deletion, note that some records cannot be removed due to legal retention requirements. Property ownership history, for example, must be kept for 25 years. However, contact preferences and marketing consents can be deleted immediately.
Updating Your Personal Information
If your mailing address or phone number changes, update it promptly. This ensures you receive tax bills and notices on time. You can make changes online, by phone, or in person.
| Method | Processing Time | Required Documentation |
|---|---|---|
| Online Portal | Instant | Login credentials |
| Phone Call | 1–2 business days | Verification questions |
| In-Person Visit | Same day | Photo ID |
In 2025, over 12,000 residents updated their contact information through the online system. The average processing time was under 5 minutes.
Changes to This Privacy Policy
This Privacy Policy may be updated from time to time to reflect changes in laws, technology, or the services provided by the DuPage County Property Appraiser. Updates are made only when necessary and are reviewed carefully to ensure they remain consistent with legal requirements and public service responsibilities.
When changes occur, the revised policy is posted with an updated effective date so users can clearly identify the latest version. Continued use of services after updates are published indicates acceptance of the revised terms, and users are encouraged to review the policy periodically to stay informed.
Notification of Updates
When significant changes occur, we notify users through multiple channels. A banner appears on the homepage for 30 days. Registered users receive an email. Printed copies are available at the office.
- Website banner for 30 days
- Email to subscribers
- Press release to local media
- Posted in office lobby
Minor updates, such as fixing typos or updating contact details, may not trigger broad notifications. However, the revision date always reflects the latest change.
Date of Last Revision
This Privacy Policy was last updated on March 15, 2026. The next review is scheduled for September 2026. All versions are archived and available upon request.
Previous versions include the 2025 update, which added GDPR-style rights for Illinois residents, and the 2025 revision, which clarified third-party data sharing during the pandemic.
Contact Us for Privacy Concerns
If you have any questions or concerns about how your information is collected, used, or protected by the DuPage County Property Appraiser, you may contact the designated Privacy Officer for assistance. All inquiries are reviewed carefully to ensure accurate responses and proper handling of your concerns.
We aim to respond to all privacy-related requests within five business days. Depending on the nature of the request, additional time may be needed for review or verification, especially when records or legal requirements are involved.
How to Reach the DuPage County Property Appraiser’s Office
Our main office is located at 421 N County Farm Road, Wheaton, IL 60187. Business hours are Monday through Friday, 8:00 AM to 4:30 PM. Closed on federal holidays.
- Phone: (630) 407-5200
- Email: propertyinfo@dupageco.org
- Privacy-specific email: privacy@dupageco.org
- Fax: (630) 407-5999
For urgent matters, call during business hours. After hours, leave a voicemail or email. Include your name, property address, and a brief description of your concern.
Additional resources include the Data Access Request Form and the Opt-Out Preference Form. Both are free to download and submit.
The DuPage County Property Appraiser remains committed to transparency, accountability, and resident trust. By following these privacy practices, we ensure your property and personal data are handled responsibly, securely, and in full compliance with Illinois law.
For more information, visit the official website: https://www.dupageco.org/PropertyAppraiser or call (630) 407-5200 during business hours (Mon–Fri, 8 AM–4:30 PM).